Vox is a little and simple music player for Mac OS X with support for many file types, including FLAC, MP3, AAC, Musepack, Monkey's Audio, OGG Vorbis, Apple Lossless, AIFF, WAV, IT, MOD, XM, Games Music and many others. Includes numerous effects like Equalizer, Reverb, Time Stretch, Pitch Shift, Echo. Moreover, all supported files can be exported to AAC+, Apple Lossless, WAV and other formats with enabled effects.

Vox 0.2.8 beta 2 released.
Include support for Audio Units presets load and save, embedded FLAC Cue sheets and artworks, many other enhancements and bug fixes.
For info and discussion about the new beta:
http://voxapp.didgeroo.com/forums/thread-189.html